Mythic: Spoils of Pandaria

Solo'd this Mythic, set to 20, 110 (890 ilvl) BM Hunter with spirit pets. Solo, this is a DPS fight against time. At this level, DPS is max and damage is minimal, if any, but timing is important to get to all four quadrants. Two quadrants finished will reset timer and open other two quadrants. AOE or burst damage is very useful against multiple of mobs.

Open specific boxes only to meet the timer, opening every box solo will waste time and fail every time. Open only medium and large boxes, then open only 4 small boxes to meet 100% bar to use the lever.

"Kick the box", I dropped down to the upper left quadrant of the box, and worked clockwise from the lever, opening only medium and large boxes to my left until I came back to the lever. The last four small boxes I opened. I periodically killed along the way, set my pets on them. These exact boxes gave 100% to use the lever. Took about 75 seconds total. Up the chain, then down the opposite opening, which would be the lower right quadrant from the box. Same routing, clockwise, only medium and large, kill along the way, keep moving, open last four small boxes, 100%. Click the lever, timer resets, door in front of you opens (upper right quadrant), and continue routine.

I had just under 90 seconds left on the last two quadrants and finished this boss. Key is medium and large boxes, 4 small boxes only, NOT EVERY BOX, and keep moving as you fight, open boxes as you fight, you will meet the time solo.

If you switch to the other side but there are mobs ALIVE at the side you came from you'll die. Also, on mogu side, when you kill a mob he spawns a spark. Sparks count as mobs so kill them as well.
Start at bottom right -> kill everything including sparks -> click on the lever -> click on the rope -> go top left -> kill everything -> click on the lever -> go through the door to bottom left -> kill everything -> click on the lever -> click on the rope -> go to top right -> click everything -> click on the lever -> done. Also, when i said everything i meant everything that spawned. You CAN have boxes unopened and still get the 50 bar progress.